I was able to get the same message when I added a file to the ipa which didn’t exist in the _CodeSignature/CodeResources file. That file is also a text file. If you extract it from the ipa, you should be able to verify it has every file stored in the IPA. If you find an extra file, that could be the problem.
I’m going to add some code to the deploy to check that file on a failure with that error code and print out any files which are not in there. For now, you may want to go to your games Binaries/IOS directory and delete everything from the directory and then try Launch On again. That may fix the issue.
-Pete